It is the single greatest place I have ever been in my life. The air pollution in the cities I went to, which included Beijing, was no worse than it is in my Colorado city. They’ve done a lot to combat it, and though there’s still bad days, we also have bad days. Hell, we were known for the “brown cloud” for decades, and still regularly have inversions that cause the cloud these days, thankfully much less often though. There’s also a lot more electric vehicles there than there are here, so less ground level pollution from exhaust. I felt so sick my first couple days back in the states and everything smelled so bad. I didn’t even realize how bad it was until my nose wasn’t accustomed to it anymore.